DC 7-110V Voltmeter Current meter Ampere Volt Gauge Red+Blue /Red+Red Dual LED Display 10A 50A 100A Features:DC 7~110V direct measurement, no independent power supply is needed, convenient for wiring.Reverse connection protection: there is reverse connection protection of working power supply, but long time reverse connection may also cause damage Note:1. The product withstand voltage is 150V. If the voltage exceeds 110V, the digital tube will be turned off. If the voltage exceeds 150V, including pulse voltage, the instrument will be completely damaged.2. The 50A/100A meter does not contain a shunt. The shunt is purchased separately. It cannot be used normally without a shunt. Specification:Working voltage: DC7~110V Measuring current range: DC0.05A~10A/50A/100A (display mode 0.05A~10.00A~100A)Voltage measurement range: DC 7~110V (display mode 0.0V~10.00V~110.0V)Refresh time: 300msDisplay mode: 0.28 inch 3-digit LEDProduct size: 46.7528.8222.20mmHole size: 45.526.0mmProduct weight: 20gLead definition:Thin red line: positive-pole of instrument power supply and positive-pole of voltage measurementThin black wire: the negative-pole of the power supply of the instrument and the negative-pole of the voltage measurementThick red line: the positive-pole of the current test, in series with the negative-pole of the loadThick black wire: negative-pole of current test, connected to negative-pole of load power supply Package included:1 * Amp Volt Gauge Dual LED Display1 * Thin red line1 * Thin black wire1 * Thick red line1 * Thick black wire